Duplex rotary force-pump



(No Model.) 2 Sheets-Sheet 1. I. P. LAMBING. DUPLEX ROTARY FORGE PUMP.

if fr A NiiiHll IIIIIIIIII (No Model.) 2 sheets-sheet 2.

' I. P. LA MBING.

DUPLEX ROTARY FORGE PUMP.

No. ,508,574. Patented Nov. 14,1893.

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iI IV n Maf -'Uivrrnn STATES ATENT OFFICE.

ISAAC P. LAMBING, OF GOLDEN, ASSIGNOR OF ONE-HALF TO EDWARD J. ROTHWELLAND ROLLON SHERMAN,'OF DENVER, COLORADO.

DUPLEX ROTARY FORCVE-PUMP.

SPECIFICATION forming part of Letters Patent No. 508,574, dated November14, 1893.

Y Y Application filed October 18,1892. Serial No. 449,281. (No model.)

To all whom it may concern/.j

Golden, .Iederson county, in the State ot' Colorado, haveinventedcertain new and useful Improvements in Duplex Rotary Force-Pumps,4

of which the following isa full, clear, and ex'- act description,reference'being had to the accompanylng drawings, forming a part hereof.

Myinvention relates to improvements in a class of pumps commonly knownas duplex rotary force pumps, and consists in the peculiar arrangementand construction of parts, as will be more fully hereinafter describedand set forth in the claims. Y

The object of my inventionl is to construct a rotary force pump whichcombines simplicity and durability in its construction and operation andwhich at the same time embodies features which render the pumpespecially applicable for use under any circumstances, where the waterhas to be throwny to a great height and in large or small quantities.

The relativesize of therotary piston cylinder and the revolving valve isan immaterial point, which is left for decision to the circumstancesland necessities under which the device is to be operated.

The revolving parts create an intense suction owing to the eXactnesswhich is usedin fitting the parts together. Y

In the drawings: Figure 1 is a vertical transverse sectional View of mycomplete device, taken on a line A-A in Fig. 2, and'showing in dottedlines, the relative location of the keystone pistons of the adjacentrevolving piston cylinder, the View being taken from' the bottom of thesheet upward. Fig. 2 is a horizontal transverse sectional view lookingedown from the top of the sheet. on a line B-B in Fig. 1. Fig. 3 is a topplan view of my complete invention showing all exterior Fig. 4 is an endelevation of, my device looking from the right-hand of Fig.- 3, andshowing in dotted lines the pipe con-= parts in detail.

necting with the discharge orifice.

Referring to the drawings: 1 indicates my vcomplete device, consistingexteriorly of two rcasings 2 which are provided with extending flanges 3by means of which the same are held together by the use of bolts 4, theinner edges of said casings 2 being provided with suitable n Ydowelingpins to hold the same in position. Be 1t known that I, ISAAC P. LAMBING,of

The casing comprises one large circular chamber, a smaller circularchamber adjoining same at one side and an upwardly projecting, anddownwardly depending orice for the reception and discharge of the liquidmaterial, and the above described construction is adapted to be mountedupon a suitable base.

Projecting laterally from both ends of the casings 2 and at a point inalignment with the Ycenter of the circular chamber above described, arehub castings 5 which are provided With'horizontal bores 6 havinganti-friction linings or bearings 7 for securing the shaft bearingsproper in position.

The casings 2 form two communicating, approximately circular chambers 8and 9, respectively designed as piston and valve chambers. The chamberS, which is of greater diameter than the chamber 9, is divided by avertically-arranged plate 10 into two subchambers 13, while upon thevalve-shaft is mounted a rotating circular division plate 11. Thedivision of the chamber 9 into two subchambers 14 is completed bytheprovision of spending chambers at the opposite'side.`

Within the respective chambers 8 and 9 are adapted to revolve a pistoncylinder and a valve, said cylinder being composed of two sections 15and 16, disposed in the respective sub-chambers 13, and the valve of twosections 17 and 18 disposed in the respective subchambers 14.

I vwill first proceed withv the description in detail, of the rotarypiston cylinder sections 15 and 16, fully setting forth their particularconstruction and position in relation to other parts. The pistoncylinder sections 15 and V16 are secured by means of their hubs 19 to ashaft 2O by a key 21 and are adapted to rev volve with the operation ofs aidshaft 20.

In the drawings I have shown the cylinder sections as having fourpistons 22 secured upon the four quadrant points of the peripheries ofeach section. These pistons 22 are substantially keystone-shaped Ainelevation and I desire to refer to them lparticularly as IOO of keystoneshape. The pistons 22 are provided with a lining 23 preferably made ofBabbitt or othei' anti-friction metal which is adapted to engage theperiphery of said cylinder sections. Upontlie peripheries of saidcylinder sections and betvt een the pistons 22, are provided gear teeth24, said gear teeth 24 and pistons 22 being preferably of the sainewidth transversely as the semi-chambers in which they are located. Inthis relation I desire to state that all the parts of my invention areproperly fitted with a slight clearance in order to deduct the liabilityof the passage of air or water under certain circumstances, as well asthe frictional wear of the parts. The pistons 22 are bolted or rivetedto the cylinder sections 16 with the keystone shaped point 25 in closeengagement with the inner curved surface of the sub-chambers 13.

The valve sections 17 and 18 are keyed upon a shaft 26 which is mountedin bearings similar to the mounting of the shaft 20, which saine will bemore fully hereinafterdescribed. The valve sections 17 and 18 areprovided at diametrically opposite points in their peripheries withsegmental] y curved recesses 27, the same being adapted for purposesmore fully hereinafter set forth. The remaining portions of' theperipheries of said rotary valve sections are provided wit-h gear teeth28 adapted to mesh into the gear teeth 24 upon the rotary cylindersections 15 and 16.

I will now describe the peculiar relative position of the rotarycylinder sections 15 and 16 with each other, and the same relation of'the rotary valve sections 17 and 18 to each other.

As before stated, in the attached drawings, there are four pistons suchas 22, made use of upon each section, but the number is immaterialexcept that with an increased or diminished number of pistons, anincreased or decreased number of recesses in the valves must be had inorder to maintain the xed relation. In the chamber in which the cylinderis adapted to be revolved, we will suppose that said section 15 is solocated that the four pistons 22 are located at the four quadrant pointsof a circle with the same upon an exact vertical and horizontal line.With the section 15 in this position, the section 16 is keyed upon theshaft 2O with the pistons 22 located between the pistons 22 upon thesection 15, that is, the section 15 has an eighth turnfarther than thesection 16. The relative relation and position of the two sections areshown by the pistons in strong and dotted lines in Fig. 1. The relativeposition of the two rotary valve sections 17 and 18 is the same as thecylinder sections 15 and 16, that is, with the section 15 as shown inFig. 1, the' valve section 17 must have its recess 27 in a horizontalposition in order that the piston 22 will engage into said recess 27when it reaches the horizontal line.

The casings 2 are each formed with two segmentally-curved extensions 29describing' part of' the curved wall of the chamber 9. The outer contourof these extensions is such that inwardly-projectingedges 29 aie formed,which serve to determine the course of the induction and eduction ofliquid material,as well as to form an inclosure substantially water andair tight.

The induction point of the pump is located below the center of the valveand adjacent the edge 29a of the lower extensions 29 which forms a partof the valve inclosnre.

The object, as before stated, of having the ingress orifice 30 locatedbelow the valve and above the lowest point of the piston cylinder, is togive the flow of water a proper curve at the point where it is caught,forced and drawn by the action of the pistons. It the water entered at apoint opposite the meshing p oint of the cylinder and valve, it wouldmaterially retard the successful action of the pump as it would tend toforce the water back instead of drawing it in.

The object of having the point of induction above the lowest point ofthe cylinder is to provide a downwardly-inclined plane for the water totravel. Thus the entrance of the water to the chamber 8 after leavingthe inlet orifice 30 is greatly facilitated by its own specific gravity.The water also enters the chamber 8 at an acute angle to, and almost ina direct line with, the line of travel of the pistons.

The discharge orifice is located immediately above the valve, or fartherout, and a flange 3l indicates the terminus of the orifice proper and astand-pipe 32 is adapted to be bolted upon the same, or a hose may beattached thereto when used as a fire pump. Within said pipe and upon theange 31, is pivoted an ordinary foot-valve 33 which assumes a verticalposition during the pumping operation but drops and closes the orificesthe instant that the' pump is stopped.

During the rotation of the cylinder and valve the pistons 22 registerwith the recesses 27 in the valve. Owing to the peculiar shape of thepistons they are adapted to bear closely against the wall of therecesses during their passage through the latter, and thereby preventany communication between the upper and lower parts of the sub-chambers13 at the forward side thereof. Thus a water tight joint is maintainedduring the engagement of a piston with one of the valve recesses. Thisfoot valve feature is an important one as my improved duplex rotary pumpis especially designed for use wltere water is to be thrown to a greatheight and in large quantities, for if I attempted to operate withoutthe foot valve, the moment that the pump was stopped, the volume ofwater in the standpipe, which may be hundreds of feet in length, wouldreturn and cause the device to act as a water motor running in areversed direction.

I will now proceed to describe an improved method of mounting the shafts2O and 26.

IIO

`to locate the Babbitt lined bushing truly and securely by runningBabbitt or other metal around it, as at 7, Fig. 2,when same is in properl position. From a point exterior of the casings 2 and upon both sidesof the same, said shafts 2O and 26 are tapered to a desired point andfrom thence to the ends of the shafts are regular in outline. The objectof this will be seen from the description wherein an anti-friction metalbushing 34 having its inner bore tapered to correspond to the taper ofthe shaft, upon which it is adapted to tit. The tapering bushing 34 maybe adjusted upon said shaft to compensate for wear in the bearing.Secured exterior of the bushing 34 the outer periphery of which isregular, is a bushing 35 having a portion of its outer surfaceexteriorly screw-threaded, while the remaining portion of its length isregular inoutline to lit into the Babbitt bearing 7.

Set screws 36 are provided in the hubs 5 to secure the determinateposition of the bushing construction upon the tapered portion of theshaft, and upon the screw-threaded end 37 is a stuffing-box cover 38,the object of which is to prevent the escape of water and the admittanceof'air.

The inwardly-tapering bushing 34 is made of anti-friction metal and canreadily be re--` newed when worn, and its exterior covering:

35 is preferablyl made of brass. The necessary wear in the bearing,owing to the weight of the Water whenv being forced to a great height,is thus taken up by the adjustable position of the construction justdescribed, as

`whenthe same is worn the adjustable bush-g ing may be moved inwardlytoward the casing, and held in a determinate position by the set screws36 located in the hub 5, and at :any time'the anti-friction metal whenworn,

may be renewed in the usual mechanical way. The bushing has acircumferential movement as well as a horizontal one, in order that thealignment of the piston cylinders can be maintained by its adjustment.-The advantage of this improved adjustable bushing will, readily be seen,as it guarantees the ready. and true operation of the device Withoutanyuneven wearing of the interior parts of same, and also renderstheliability and cost of re-v pairs much less than in former pumps ofthe! rotary duplex pattern. The clearance of the interior revolvingparts is-very-slight in order that the least amount of air will enterthe pump.

The pump is adapted to be operated by power applied to either therevolving cylinder or of the valve shaft.

By reference to the drawings the direction of lthepassage of the suctionand water can be traced by the arrows, and by the revolving of thecylinder and valve in opposite directions, the impulse given to both thecylinder and-valve creates a suction which is vcapable of drawing thewater from a considerable depth, though it is designed more especiallyfor force pumps. The gearing of the cylinder with the valve guarantees acertain relative speed which the parts will acquire, whether the poweris applied to the cylinder or valveshaft, and in this adaptation liesone of the points of my invention. The peculiar shape of the piston andits operation in the semicircular recess, guarantees the suction of thewater whether the pump is rotated slow or fast. By the keystone shape ofthe extremity 25 of the piston 22, withits sharp corners and recessedportions, the water is more readily drawn into the pump, while any sandor solid matter will be attracted away from the face ofthe casing andheld in the recessed parts of the piston, thus preventing the frictionalwear of the piston and theinside of the casing.

I now wish to particularly describe the operation and function of thekeystone 1piston 22 in the semi-circular recess 27. Taking for examplethe portion of Fig. l wherein the Vpiston is shown in the recess, wewill premise that the piston is turned back with the cylinder and alsothe valve turned over in an opposite direction, which same would bringthe corner 39 of the piston in contact with the corner 40 of the recess27 Now as the revolution of both the cylinder and the valve continues,the point 39 necessarily leaves the recess and to continue the function,the corner 4lcomes into position and serves the same purpose, inpreventing the packing of thewater and the passing through the valve ofsame. Next comes the extreme end 25 with its sharp corners which-exactlyts into the face of the recess 27, and as the piston continues in itsdownward course, the opposite corner 39 of the piston 22 comes intocontact with the corner 42 of the recess and then comes the meshing ofthe gear teeth 24 and 28, which lit tight preventing the escape of thewater down between the valve and piston cylinder.

The operation of the pistons are similar,

fand the advantages gained by the same will be apparent, as itpositively prevents the water from jamming in the parts, and therebychecking each revolution of the piston cylinder and diminishing the lifeof the pump.

Having fully described my invention, what I claim .is-

l.v An improved rotary duplex force pump comprising a casing having apiston chamber and a valve chamber communicating therewith, saidchambers being each divided ver- IZO valve sections having peripheralrecesses registering with and adapted to receive the pistons of therespective drum sections; substantially as set forth.

2. An improved rotary duplex force pn mp, havingapiston drum comprisingtwo sections separated by a division wall, each of said sectionscarrying pistons each comprising two outwardly-Haring portions, theouter one of the latter being smaller than the inner portion, thepistons of the respective drum sections bein g located alternately inthe plane of the drum, and a rotary valve provided with peripheralrecesses adapted to register with the pistons; substantially as setforth.

3. An improved rotary duplex force pump, having a piston drum, a numberof pistons located upon the periphery of said piston drum, the points ofeach of said pistons substantially of the form of a double key stone,substantially as set forth.

4. An improved rotary duplex force pump, having a piston drum, pistonslocated upon the periphery of said drum,said pistons constitutingcastings projecting beyond the line of the gear teeth, and the points ofsaid castin'gs being substantially in the form of a double keystone,substantially as set forth.

5. An improved rotary duplex force pump, having a piston drum providedwith pistons located at determinate distances upon its periphery saidpistons being substantially in the form of a double keystone,substantially as set forth.

6. An improved rotary duplex force pump, comprising a rotary drum, arotary valve provided with peripheral recesses, and pistons carried bysaid drum and consisting of a base portion and two outwardly-Haringportions, the outer one of the latter being contracted, from itsperiphery to where it joins the inner one substantially as and for thepurpose set forth.

7. An improved rotary duplex force pump, comprising a rotary drum andvalve, said valve being provided with peripheral recesses, and pistonscarried by said drum and con'- sisting of three sections decreasing insize from the inner to the outer section, the corners of said sectionslying in an arc of a circle; substantially as and for the purpose setforth.

8. An improved rotary duplex force pump, comprising a rotary drum, arotary Valve geared therewith and provided with peripheral recesses, andpistons carried by said drum and adapted to engage said recesses, saidpiston being of a double-keystone shape; substantially as and for thepurpose set forth.

9. An improved rotary duplex force pump, comprising piston and Valvechambers, an inwardly and downwardly extendinginlet channel locatedbelow the valve and above the lower end of the piston chamber, a rotarydrum and valve respectively located in the piston and valve chambers,said valve being provided with peripheral recesses, and pistons carriedby the drum and adapted to register with said recesses, said pistonsbeing substantially of a double-keystone form; substantially as setforth.

lO. An improved rotary duplex force pump, comprising piston and valvechambers, an outwardly and upwardly extending outlet channel having itsinner end located essentially below the upper end of said pistonchamber, a rotary drum and valve respectively located in the piston andvalve charnbers, said valve being provided with peripheral recesses, andpistons carried by the drum and adapted to register with said recesses,said pistons being substantially of a doublekeystone form; substantiallyas set forth.

ll. An improved rotary duplex force pump, comprising piston and. valvechambers, inlet and outlet channels located between the upper and lowerends of the piston chamber, a rotary drum and valve respectively locatedin the piston and valve chambers, said valve being provided withperipheral recesses, and pistons carried by the drum and adapted toregister with said recesses, said pistons being substantially ofadouble-keystone form; substantially as set forth.

12. An improved rotary duplex force pump, comprising piston and valvechambers, tapered shafts passing centrally through said chambers, arotary drum and valve mounted respectively on said shafts, pistonscarried by said drum, said pistons each comprising two outwardly-flaringportions, the outer of which being contracted, anti-friction bushingshaving inwardly-tapering bores to receive the shafts, and metallicbushings exterior of said anti-friction bushings, said metallic bushingsbeing adapted to be adjusted inwardly in a metal-lined bearing providedinthe casing; substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

ISAAC P. LAMBING.

Witnesses:

HERBERT A. ROBINSON, ED. E. LONGAN.

"l OO

